File:San Diego Zoo entrance elephant.jpg|thumb|right|The entrance of the San Diego Zoo, California, May 2007
File:Giants of the Savanna Inhabitants.jpg|thumb|right|Giants of the Savanna Exhibit at the Dallas Zoo, Texas, October 2011
A '''zoo''' (short for '''zoological garden''' or '''zoological park''', and also called an '''animal park''' or '''menagerie''') is a facility in which animals are confined within enclosures, displayed to the public, and in which they may also be bred.
The term zoological garden refers to zoology
, the study of animals, a term deriving from the Greek language|Greek
''zōion'' (ζῷον, "animal") and ''lógos'' (λóγος, "study"). The abbreviation "zoo" was first used of the ''London Zoological Gardens
'', which opened for scientific study in 1828 and to the public in 1857.
[[http://www.zsl.org/info/about-us/zsls-history,129,AR.html "ZSL's history"] , Zoological Society of London.]